Add compile time checks

#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))

#define INVALID_FD (-1)

#define CONCAT(a, b) a##b

// Use during compile time to check conditional values

// NOTE: The the failures will present as a generic error

// "error: initialization makes pointer from integer without a cast"

// but the file and line number will present the condition that

// failed.

#define DUMMY_COUNTER(c) CONCAT(__osi_dummy_, c)

#define DUMMY_PTR DUMMY_COUNTER(__COUNTER__)

#define COMPILE_ASSERT(x) char * DUMMY_PTR = !(x)

typedef uint32_t timeout_t;